Bip39 Release Date Default range of iterations used in wallets is 2048. Expanding this quantity need to make it more secure from brute drive assaults, even so you'll have to store this value. To obtain your wallet with personalized PBKDF2 you need to use this script (or very similar) to https://bookmarkize.com/story18554737/bip39-mnemonic-phrase-word-list-indicators-on-seed-phrase-generator-you-should-know